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I've had this gun for a good few years but about to swap it for the nr83a2Unless you have a pacific need to shoot bigger nails buy the nr83a2. Its cheaper lighter and will shoot into anything your likely to come across.8's weren't a problem to start off with but now jam regularly and drive me mad hence the swap.
This nailer would not feed 16d nails reliably so had to return it. I called Hitachi and they told me the feeder on this unit is larger to accomodate full size 3 1/2 inch nails strips. Since I am using 3 1/4 inch 16d and 8d most of the time, they recommended I buy the NR83AC nailer instead. I wish this information had been in the product details.
If you only feed it one rack of 8d nails at a time (it holds 2) then the jamming is not so bad. I have bought 2 of these guns in the last 3 years to replace senco's and they are simply the best.EXCEPT They jam when using 8d's (2-3/8" nails). I am convinced that there is not a better gun made that can shoot a big nail through the tuffest wood. The NR83 shoots 8d's better but it doesn't have the punch of the NR90, nothing does. What happens is the nail track is too big for the 8d's and eventually they ride up on each other and don't feed properly after you have shot a couple boxes of them. This is a common problem with most framing guns because of the different diameter nails they shoot. If you plan on doing some heavy duty framing get the NR90. If you are an occasional or light duty user or a hobiest get the NR83 but get a Hitachi.
6d(2") nails are not for this gun. I do not usually use bump fire, can be a safety hazard,waste of nails,inconsistent depths, but you even can bump fire one nail in the sequence mode, great feature on the AC3.11/09 update; Now using an AC3 with a skilsaw rafter hook added, I updated only because I like the easy flip trigger lever;still no issues with 8D's except I had 1 jam due to the plastic collation strip was doubled over from a partial strip stack,remove rear magazine bolt, remove jam, replace. Cheap off brand nails or the wrong angle=jams. I own a NR90AC2,same gun but does not have a lever select on the trigger:On the 8d nail issue,in that size, I shoot ORCO brand,made in USA, in the gun, 2 3/8" ring shank Egalv. And, it is not the alien ugly neon green on the now discontinued models. AC3 has a lever to change it, AC2 you have to change out the whole trigger assembly.This is an excellent gun ,drives into anything wood,but you have to use good quality nails and be aware of the trigger b/c it has a lot of power.
Change out the trigger and you can not double fire as was said.
I always shoot ringshank into sheet goods b/c of the better grip.
Basically an all metal design, high quality ,made in Japan is just as good as it gets if you want a powerful well made framer that shoots CA code RH 16D 3.5" x 0.162.
and never had a jam.
Forgot to mention also using Grip Rite and Senco ring shank galv 3" are excellent for grip and can be used in PT lumber as well.
6d's are not code here in CA anyway.
The single fire AC2 issue, you need to change out the trigger, the included one is a NOT a single fire(sequential) and will easily double fire, it is a contact fire(bump) type.
Still the best out there IF you do not use cheap off brand nails.
They have gone back to the classic pale green most prefer and idenify with hitachi air tools
We Purchased the NR90HitachiAC3 because we liked the Hitachi83 that we had for years, but didn't have an adjustment for the nail depth. If you want it for nailing the shear walls with 8d's. That is the main reason that we bought the gun for the 8's as we wanted to be able to adjust the depth while doing the sheathing for all the required engineering.
The bigger nails, it shoots fine with not much kick back. Not just a few times, but every time. They advertise that it shoots nails from 8's to 16's.
The nails either jam or the slide slips by the nails. Doesn't jam on them. The 8's are a nightmare.
If you are buying this gun for shooting 10's or 16's then it is a fine gun. forget it, it is a waste of time and money.
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